Originally Posted by Xontroi
Hmmm for this season it sounds high with body on. What body did you use? Enough holes on it? Which head did you used as a replacement at OS?
These temps was for Nova as it came from factory, for OS factory or OS with replaced head?
legal holes on body, tried with the entire rear window out and it made no difference, enlarged front hole and it made no difference either. I have a Red Alpha head on the OS and A GO engine head on the NOVA. The Nova temps were way higher and that is expected because the head is smaller than the OS head
Originally Posted by Roelof
Do you have only an opening in the front window or also one in the rear? (which is needed).
And what plug are you using? The OS XZR wants to have a RP7 or even a RP8 plug (R7), if you are using offroad plugs like a nr 5 or lower then that can also be the cause of the heat.
And sometimes a different exhaust can make a difference in temperature.
It actually ran cooler with the rear window solid than without it. I made the window removeable and tried it back to back both ways.
Running a RP7 plug but have an 8 ready for homestead.
All pipes were the same 2050, 2052 and even tried an RB off road pipe
Only thing that brought the temps down was simply a bigger head
I wouldnt think that any small thing would make up 100 degrees!! the NOVA went from 310 to 210 and the OS went from 290 to 230 ish but i wasnt pushing the car nearly as hard as i was the NOVA and the OS was on break in mode with no second gear shifting. I thin it just boils down to needing a bigger head. these engines are designed for Pan cars that have the engine head exposed and GT cars dont. Before i switched to the onroad engines, none of my Off road engines had this problem and with the bigger heads they run perfect. When i went to the bigger head on my NOVA i went immediately one full turn lean on the HSN and it was still a little fat!